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Stainless Steel Stamping Parts
-- Steady & Reliable Manufacturer --
Yuyao Hongli Optoelectronics Co., Ltd. is a leading OEM manufacturer of Stainless Steel Stamping Parts, supplying precision brackets, housing covers, clips, and structural components for automotive, industrial, and electronics applications. Operating out of our 5,000-square-meter facility in Yuyao, Zhejiang, we utilize advanced servo presses, progressive stamping dies, and fiber laser cutting systems to process 304, 316, 316L, and 430 stainless steel grades. Engineered for high corrosion resistance, dimensional stability, and extreme durability, our parts maintain tight tolerances down to 卤0.01mm. Partner with Yuyao Hongli for custom die design, chemical passivation, and full-scale contract manufacturing.
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Stamped sheet metal parts for automotive
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Stamped circular parts with holes
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Stamped square parts with holes
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Stamped ultra-thin parts
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Stamped small square parts
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Stamped miniature parts
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Stamped bendable strip-shaped parts
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Square-shaped precision machined stamped parts
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Stamped chassis parts
MANUFACTURING CAPABILITIES
Equipment and process capabilities
From mold design to batch stamping, we cover production needs of different tonnages and precision levels.
- 01
High-Precision Progressive Die Stamping
Using multi-station progressive stamping tools, we perform continuous punching, forming, and bending of stainless steel strips with exceptional pitch accuracy and high efficiency.
- 02
Deep Drawing & Shell Forming
Our deep drawing processes utilize specialized lubricants and hardened carbide dies to shape seamless stainless steel cups and sensor housings without structural galling or wrinkling.
- 03
Fine Blanking & Precision Piercing
We deliver smooth, clean-sheared edges and micro-hole piercing on stainless steel sheets, eliminating secondary deburring and shaving operations.
- 04
In-House Chemical Passivation
Integrated chemical immersion lines remove free iron contaminants from stamped surfaces, regenerating the chromium-oxide passive film for superior rust resistance.
SPEC · Overview of Key Equipment Parameters
| Equipment Type | Tonnage / Specification | Machinable Material | Typical Processing Thickness |
|---|---|---|---|
| Servo Precision Stamping Press | 45T - 200T Servo Motion Press | SUS304, SUS316, SUS316L, SUS430 | 0.2mm - 3.5mm Stainless Steel |
| Deep Drawing Hydraulic Press | 100T - 250T Double-Action Press | Austenitic & Ferritic Stainless Alloys | 0.4mm - 2.5mm Stainless Sheet |
| High-Precision Fiber Laser Cutter | 3000W CNC Fiber Laser | Stainless Steel Plate | 0.5mm - 6.0mm Prototype Cutting |
| Chemical Passivation Tank System | Ultrasonic Acid Passivation Line | Stamped Stainless Steel Parts | ASTM A967 & AMS 2700 Compliant |
QUALITY CONTROL
Full-process quality control system
From incoming material inspection to full outgoing inspection, key processes are equipped with inspection points to ensure batch consistency.
Corrosion Resistance & Salt Spray Testing
Validating long-term rust prevention across harsh outdoor and chemical environments.
- Neutral Salt Spray (NSS) testing per ASTM B117 up to 960 hours without red rust.
- Copper Sulfate chemical testing (ASTM A380) to confirm total free-iron removal.
- Environmental humidity chamber testing for automotive and marine grades.
Optical & CMM Dimensional Verification
Ensuring absolute geometric compliance against customer CAD files and specifications.
- 3D Coordinate Measuring Machine (CMM) checking for complex contours and hole locations.
- High-resolution 2D optical measuring systems for rapid lot sampling.
- Wall thickness laser micrometers for deep-drawn shells and cups.
Material Grade Verification & Hardness Audit
Confirming raw material chemistry and physical properties prior to stamping.
- XRF Spectrometer (PMI) analysis to verify nickel and chromium content.
- Micro-Vickers hardness testing to monitor work-hardening during multi-stage forming.
- Surface roughness testing (Ra values down to 0.2 碌m).
SURFACE FINISHING
Surface treatment process
Depending on the usage environment and appearance requirements of the parts, we offer anti-corrosion, wear-resistant, or decorative surface treatment solutions.
| Finishing Process | Applicable Material | Primary Function | Typical Application |
|---|---|---|---|
| Chemical Passivation | 300 & 400 Series Stainless Steel | Restores and strengthens passive corrosion layer by removing surface iron | Automotive sensor brackets, food processing equipment, medical parts |
| Electropolishing | SUS304, SUS316L Stainless Steel | Removes microscopic burrs and delivers a smooth, ultra-bright mirror finish | Sanitary fittings, marine hardware, high-end decorative covers |
| Hairline / Satin Brushing | Stainless Steel Sheet Stock | Applies clean linear grain lines for modern aesthetic scratch resistance | Appliance front panels, luxury architectural trims, electronics faceplates |
| Vibratory Mass Finishing | All Stainless Steel Grades | Smooths sharp stamped edges and rounds radii for safe handling | Internal brackets, retaining clips, mounting plates |
Note: The above is a standard process list. Specific film thickness, color, and salt spray resistance rating can be customized according to customer drawings.
APPLICATIONS
Main application areas
Our products are widely used in industries that require high structural strength and precision consistency.
Automotive Exhaust & Engine Components
Heat and corrosion-resistant stainless steel stampings built for demanding vehicle systems.
- Exhaust manifold heat shield brackets
- Oxygen sensor mounting bosses and retainers
- EGR valve diaphragm covers and sealing plates
Industrial Machinery & Fluid Systems
Durable stainless steel stampings engineered for high-pressure and chemical contact exposure.
- Pump housing cups and valve plates
- Sanitary pipe connection clamps and flanges
- Flow meter housing brackets
Electronics & Enclosure Hardware
Precision stainless steel shielding and structural components for electronics and appliances.
- EMI/RFI shielding covers and grounding clips
- Server rack mounting brackets and latches
- Outdoor electrical box hinges and clasps
PRODUCTION / FACTORY ADVANTAGES
Factory production advantages
With its own factory and equipment, the company ensures stable delivery times and controllable costs.
20+ Years of Stainless Tooling Expertise
Yuyao Hongli brings over two decades of specialized tool engineering, springback control, and stainless steel stamping experience.
Integrated Tool Shop & Passivation Line
We build precision progressive dies and perform in-house chemical passivation in our Yuyao facility.
Full Traceability & Material Certification
Every batch includes complete material composition test reports, heat numbers, and CMM inspection documentation.
CUSTOM MANUFACTURING PROCESS
Customized production process
From receiving drawings to batch delivery, standardized processes ensure traceability at every stage.
1. DFM Review & Material Selection
Engineers analyze part prints, evaluate work-hardening factors, select optimal stainless grades, and simulate forming stress.
2. Progressive Tooling Design & Build
In-house toolmakers fabricate stamping dies with high-durability carbide inserts to withstand stainless steel wear.
3. Trial Stamping & First Article Inspection (FAI)
Sample parts undergo 3D CMM inspection, salt spray checks, and passivation verification for customer sign-off.
4. High-Speed Production & Passivation
Automated stamping presses run high-volume production, followed by vibratory deburring and ultrasonic passivation.
5. Final Quality Audit & Export Packaging
Parts undergo 100% optical inspection, anti-scratch packaging, and secure export cartoning.
FAQ
Frequently Asked Questions
Here are some questions that clients often ask before cooperating with us.
What grades of stainless steel do you process for stamping parts?
We regularly stamp 304, 304L, 316, 316L, 430, and 17-7PH spring stainless steel alloys.
How do you handle stainless steel springback during forming?
Our engineers use specialized die geometry, over-bending allowances, and finite element simulation to compensate for material springback.
Can you provide chemical passivation certification?
Yes. All passivated stainless steel parts are tested and certified per ASTM A967 standards.
What is your typical lead time for custom stamping tooling?
Custom progressive tooling design and fabrication take 25 to 35 days, with sample parts delivered immediately following tryouts.
About Us
Yuyao Hongli Optoelectronics Co., Ltd.
Yuyao Hongli Optoelectronics Co., Ltd. is a comprehensive enterprise with over 20 years of experience in the manufacturing industry. Located in the Yangming Science and Technology Industrial Park of Yuyao, Zhejiang Province, it enjoys convenient transportation and a solid industrial foundation. As a famous China Stainless Steel Stamping Parts Suppliers and Stainless Steel Stamping Parts Factory, founded in 2000, formerly known as Yuyao Hongli Optoelectronics Educational Instruments Co., Ltd., the company is wholly owned by a natural person, with Xie Gang as the legal representative. Its registered capital of 500,000 yuan has been fully paid up, and it has maintained its continued development through stable operations.
Relying on a 5,000-square-meter modern factory and multiple stamping workshops, the company has built a diversified product system. Its core businesses cover the manufacturing, processing and wholesale and retail of educational instruments, optical instruments, household electric heaters, small household appliances, auto parts, hardware and plastic products, etc. At the same time, it operates and acts as an agent for the import and export trade of goods and technologies, and its products are sold at home and abroad.
The company brings together industry management elites and senior engineers to form a mature R&D and management team. Adhering to the business philosophy of "integrity and pragmatism," it is committed to providing customers with high-quality products and comprehensive after-sales service. Leveraging its diversified portfolio, certification guarantees, and import/export advantages, the company actively expands cooperation both domestically and internationally, and is willing to establish long-term and stable trade partnerships with partners from all sectors, continuously striving forward in the wave of intelligent and high-end development in the manufacturing industry.
Relying on a 5,000-square-meter modern factory and multiple stamping workshops, the company has built a diversified product system. Its core businesses cover the manufacturing, processing and wholesale and retail of educational instruments, optical instruments, household electric heaters, small household appliances, auto parts, hardware and plastic products, etc. At the same time, it operates and acts as an agent for the import and export trade of goods and technologies, and its products are sold at home and abroad.
The company brings together industry management elites and senior engineers to form a mature R&D and management team. Adhering to the business philosophy of "integrity and pragmatism," it is committed to providing customers with high-quality products and comprehensive after-sales service. Leveraging its diversified portfolio, certification guarantees, and import/export advantages, the company actively expands cooperation both domestically and internationally, and is willing to establish long-term and stable trade partnerships with partners from all sectors, continuously striving forward in the wave of intelligent and high-end development in the manufacturing industry.
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